these sentences are part of the instructions to use the inhaler. In this sense, the verb is in the imperative mood, which, in this case, expresses a request rather than an order. Whoever uses this implement is requested to breathe out.I would not call "to breathe out" a true phrasal verb. Breathing is made of two steps: inhaling (taking air into your lungs) and exhaling (blowing it out of your lungs).The preposition "out" does not change so much the meaning of "to breathe" and in this sense, "to breathe out" is not a phrasal verb."As far as" is an adverb. It modifies the following verb "is" comfortable.It means that before inhaling the content of the inhaler, you have to expel air from your lungs until (as far as) it is comfortable, that is you do not have to forcefully insist in expelling air.As to your doubt about the usage of "is", I think that you would understand it if I added the pronoun "it" and replaced "as far as" with "until"."Breathe out until it is comfortable". "it" refers to "breathe out". However in sentences with "as far as" or just "as" the pronoun "it" is omitted, like in "as is well known"."Comfortable" modify "breathe out". You breathe out until the breathing out is comfortable.

Hope this helps.AnEng"Search as if you are going to find, and find as if you have still to search....." (St. Augustine)

although I am not a native speaker, your sentences do not sound so natural.

In the first one "I was putting the sheet on the pillow", the word sheet is not used for a pillow. One speaks of a bed sheet, but for pillow one would say pillowcase or a pillowslip or just slip.

In this sense, I would rephrase your sentence as "I was pulling the pillowcase on the pillow".

As to the question, it is not grammatical as it is, unless you did it deliberately to indicate that your son is still small and cannot speak correctly. Otherwise I would rephrase it at least as "Why putting on the pillowcase?"

The part in bold "It's more cozy for you." sounds fine, although I would have used cozier, but I guess more cozy is fine too according to NGram....

Hope it helpsAE

"Search as if you are going to find, and find as if you have still to search....." (St. Augustine)

As to the first sentence, I would say "there is a big field in the park.

For the second, the word is court.

The word field, as it is used in your first sentence, means a wide, open and level expanse (extent, surface) of land. The field is also the area where athletics takes place or where one of the two baseball teams plays.

The word court is more precise. It is the area where some sports are played. In this sense, a court is marked with all the appropriate lines that define the different zones.

A tennis, basketball, handball court for example.

Paid attention that the word court cannot be use for every sport. For instance one refers to a golf course, a football pitch, a baseball diamond (but also field).

Hope it helps.AndEng"Search as if you are going to find, and find as if you have still to search....." (St. Augustine)

also these sentences are somehow wrong as they are confusing, because, while the subject of the first part is clear, the -ing form (a participle) in the second part is somehow dangling, that is, it is not so clear which noun of the first part it modifies.

In this sense, adding a comma does not help to clarify the meaning.

The sentence 1,2,5 and 6 are very confusing, as it seems that Tom kissed her while he was wearing her wedding dress.... which would sound as being part of a sitcomor that you talked to her while you were putting on her clothes....again the sitcom.

The sentences 3 and 4 are correct but the meaning is that you tripped him up as you were walking through the door.

I don't quite understand the function of "unaware" in the sentence that you amended. Who is unaware? The boys? The uncle has done that deliberately in order to see them die. Am I right? Maybe I don't understand the meaning of "unaware that" in this case. Could you please clarify it?

Thanks so much in advance.

AndEng"Search as if you are going to find, and find as if you have still to search....." (St. Augustine)